CN108239734A - A kind of ultrasonic implement treatment method for reducing titanium-alloy thin-plate residual stress of welded structure - Google Patents
A kind of ultrasonic implement treatment method for reducing titanium-alloy thin-plate residual stress of welded structure Download PDFInfo
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- CN108239734A CN108239734A CN201611218344.5A CN201611218344A CN108239734A CN 108239734 A CN108239734 A CN 108239734A CN 201611218344 A CN201611218344 A CN 201611218344A CN 108239734 A CN108239734 A CN 108239734A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to a kind of ultrasonic implement treatment methods for reducing titanium-alloy thin-plate residual stress of welded structure, belong to metal working technical area, which is as follows：(1) selection of impact head：Ultrasonic implement treatment is carried out to titanium-alloy thin-plate welding structure；According to titanium-alloy thin-plate welding method, select impact head shape and welding point shape it is closely related, during electron-bombardment welding, weld width is narrow, therefore is applicable in flat impact head, and the width of impact head is 1.5 2.5mm；(2) ultrasonic impact treatment process：Impact mode is used to be impacted for toe of weld, number of shocks is 24 times, and impact velocity is 150 300mm/min.The present invention can targetedly be handled weld seam with selective；The treatment process elimination welding residual stress of the present invention is with obvious effects, may be incorporated into beneficial compression.
Description
Technical field
The present invention relates to a kind of ultrasonic impact processes for reducing titanium-alloy thin-plate welding binding structure residual stress, belong to
Metal working technical area.
Background technology
Metal welding is common a kind of processing technology in process of metal working.Welding be it is a kind of part, it is non-uniform plus
But process, metal material, due to the uneven temperature field with distribution, lead to weld seam residual-tensile stress to hot and cold after welding
It generates.Influence of the welding residual stress to welded unit is very big, and when static load can lead to stress concentration, cause strain cracking；It reduces
The stability of compression member；Reduce the rigidity of structure and fatigue strength；Reduce weldment machining accuracy and dimensional stability；Can cause should
Power corrosion cracking.These influences can substantially reduce the service life of welded unit, limit its use environment.
The traditional effective ways for eliminating welding residual stress have bulk heat treatmet, local heat treatmet, hammering method, mechanical stretching
Method, thermal tension method, Vibration aging facture.The above method all has certain limitation and timeliness, such as：Although heat treatment method can
Effectively to reduce residual stress, it is widely used, but energy consumption is big, time-consuming；Dimensional structure is restricted；Metal is caused to aoxidize,
The problems such as weld metal zone coarse grains.Although traditional Mechanical Method can be energy saving, at low cost, the application of each method
Range all has certain limitation.These methods can be combined with each other use, and welding residual stress is eliminated most to reach
Good effect, while the method that us is also required to go the new elimination residual stress of research.
Ultrasonic implement treatment is a kind of method of new elimination welding residual stress to grow up in recent years, has and sets
Standby light, the easy to operate, material to workpiece, shape, structure and size, operating condition etc. are unlimited, and human body will not be caused
Any the advantages that endangering.While eliminating and changing welding stress, fatigue behaviour, the tension that can also improve welding point are strong
Degree, crystal grain thinning the advantages that preventing micro-crack generation and extend, improve the service life of welded unit.
Different use environments proposes different requirements to welded unit performance, needs using different welding methods, and then
The shape for obtaining weld seam is dramatically different.Wherein, electron-bombardment welding has speed of welding high, and heat affected area is small, weldment deformation is small,
The advantages that quality of weld joint is good is a kind of common welding method.
In order to efficiently eliminate the residual stress of commissure, structural reliability is improved, is needed using appropriate ultrasonic impact
Technique.
Therefore it provides a kind of operating aspect, efficient, significant effect and have selection and repeatability be suitable for electron beam
The ultrasonic impact treatment process of welded blank residual stress just becomes the technical field and is badly in need of the technical barrier solved.
Invention content
It is an object of the invention to improve the existing method for eliminating titanium alloy welding plank residual stress, a kind of behaviour is provided
Work aspect, efficient, significant effect and the ultrasound suitable for electron beam welding plank residual stress for having selection and repeatability
Impact treatment process.
To achieve the above object, the present invention takes following technical scheme：
A kind of ultrasonic impact treatment process method for reducing titanium alloy plate residual stress of welded structure, its step are as follows：
(1) selection of impact head：Ultrasonic implement treatment is carried out to titanium-alloy thin-plate welding structure；It is welded according to titanium-alloy thin-plate
Connect method, select impact head shape and welding point shape it is closely related, during electron-bombardment welding, weld width is narrow,
Therefore flat impact head is applicable in, the width of impact head is 1.5-2.5mm；
(2) ultrasonic impact treatment process：Impact mode is used to be impacted for toe of weld, number of shocks is 2-4 times, and impact velocity is
150-300mm/min。
Preferably, the width of impact head described in the step (1) is 2mm.
Preferably, the welded weld width of titanium-alloy thin-plate described in the step (1) is 3mm-6mm.
Preferably, the number of shocks of the impact of toe of weld described in the step (2) is 3 times, impact velocity 250mm/min.
Preferably, the width of the impact of toe of weld described in the step (2) is 4mm, 90 ° of angle of attack, single side impact.
The advantage of the invention is that：
(1), compared with residual stress technique is eliminated in heat treatment, heat treatment process energy consumption is big, time-consuming；Weldment size knot
Structure is restricted；And the problems such as easily causing metal oxidation, weld metal zone coarse grains, and ultrasonic impact technique can be to arbitrary ruler
Very little, arbitrary shape welded unit is handled, and easy to operate, take it is short, energy consumption it is small.(2) with traditional hammering method
It compares, traditional hammering randomness is big, it is difficult to ensure that the consistency of hammering, working efficiency is low, and ultrasonic impact technique can be controlled
The treatment process parameter of system quantization thereby may be ensured that the consistency of operation.(3) compared with traditional hammering or heat treatment process,
Ultrasonic impact technique eliminates the significant effect of welding residual stress using suitable impact head, and can introduce beneficial pressure and answer
Power.
Below by the drawings and specific embodiments, the present invention will be further described, but is not meant to protect the present invention
Protect the limitation of range.
Description of the drawings
Fig. 1 is the structure diagram that this bright middle electron beam welding line passes through toe of weld impact.
Fig. 2 is longitudinal residual stress comparison before and after the titanium alloy electron beam weldering welding thin plate impact in the embodiment of the present invention 1.
Specific embodiment
As shown in Figure 1, pass through the structure diagram of toe of weld impact for this bright middle electron beam welding line；As shown in Fig. 2, for this
Longitudinal residual stress compares before and after titanium alloy electron beam weldering welding thin plate impact in inventive embodiments 1.
Embodiment 1
Ultrasonic implement treatment is carried out to the titanium-alloy thin-plate electron beam weldering welding structure of 3mm thickness.Include the following steps：
The first step：The selection of impact head：According to titanium-alloy thin-plate welding method, the shape and welding point of impact head are selected
Shape it is closely related, during electron-bombardment welding, the narrow 5mm of weld width, therefore select the flat shape impact head of 2mm；
Second step：Ultrasonic impact treatment process parameter optimization：The optimization of welded unit is welded according to titanium-alloy thin-plate electron beam
Treatment process, impact mode be toe of weld impact process, impact velocity 200mm/min, width 4mm, 90 ° of angle of attack, punching
Hit number 3 times, single side impact；
Effective evaluation：The titanium-alloy thin-plate electron beam weldering welding structure of 3mm thickness is carried out with conventional stress test method
Stress before and after ultrasonic implement treatment is tested, and the results are shown in Figure 2：Stress value before ultrasonic impact at welding point
It is distributed between 500MPa~820MPa, the peak stress of Weld pipe mill is 816MPa.Toe of weld impact after stress peak from
816MPa is reduced to -153Mpa.Also there is reduction by a relatively large margin in residual stress at melt run.The high level tensile stress of commissure
Low value compression is converted into, achieves unexpected technique effect.
Embodiment 2
Ultrasonic implement treatment is carried out to the titanium-alloy thin-plate electron beam weldering welding structure of 1mm thickness.Include the following steps：
The first step：The selection of impact head：According to titanium-alloy thin-plate electron beam welded structure, weld width 3mm, therefore select
With the flat shape impact head of 2mm；
Second step：Ultrasonic impact treatment process parameter optimization：The optimization of welded unit is welded according to titanium-alloy thin-plate electron beam
Treatment process, impact mode be toe of weld impact process, impact velocity 150mm/min, width 4mm, 90 ° of angle of attack, punching
Hit number 3 times, single side impact.
Effective evaluation：The titanium-alloy thin-plate electron beam weldering welding structure of 1mm thickness is carried out with conventional stress test method
Stress before and after ultrasonic implement treatment is tested, the stress value before ultrasonic impact at welding point be distributed in 450MPa~
Between 700MPa, the peak stress of Weld pipe mill is 700MPa.After toe of weld impact stress peak be reduced to from 700MPa-
180MPa.Also there is reduction by a relatively large margin in residual stress at melt run.The high level tensile stress of commissure is converted into low value pressure
Stress.
Embodiment 3
Ultrasonic implement treatment is carried out to the titanium-alloy thin-plate electron beam weldering welding structure of 1mm thickness.Include the following steps：
The first step：The selection of impact head：According to titanium-alloy thin-plate electron beam welded structure, weld width 6mm, therefore select
With the flat shape impact head of 2.5mm；
Second step：Ultrasonic impact treatment process parameter optimization：The optimization of welded unit is welded according to titanium-alloy thin-plate electron beam
Treatment process, impact mode be toe of weld impact process, impact velocity 200mm/min, width 4mm, 90 ° of angle of attack, punching
Hit number 4 times, single side impact.
Effective evaluation：The titanium-alloy thin-plate electron beam weldering welding structure of 1mm thickness is carried out with conventional stress test method
Stress before and after ultrasonic implement treatment is tested, the stress value before ultrasonic impact at welding point be distributed in 4850MPa~
Between 750MPa, the peak stress of Weld pipe mill is 745MPa.After toe of weld impact stress peak be reduced to from 745MPa-
140MPa.Also there is reduction by a relatively large margin in residual stress at melt run.The high level tensile stress of commissure is converted into low value pressure
Stress.
Present inventors have surprisingly found that the significant effect of welding residual stress, Er Qieke are not only eliminated using toe of weld impact
To introduce beneficial compression, unexpected technique effect is achieved.
The ultrasonic impact treatment process of the reduction titanium alloy plate residual stress of welded structure of the present invention is a kind of operation side
Face, efficient, significant effect and have selection and repeatability ultrasonic impact treatment process, the present invention can targetedly and select
Selecting property handles weld seam.
Claims (5)
1. a kind of ultrasonic implement treatment method for reducing titanium alloy plate residual stress of welded structure, its step are as follows：
(1) selection of impact head：Ultrasonic implement treatment is carried out to titanium-alloy thin-plate welding structure, using flat impact head, punching
The width tapped the head is 1.5-2.5mm；
(2) ultrasonic impact treatment process：Impact mode is used to be impacted for toe of weld, number of shocks is 2-4 times, impact velocity 150-
300mm/min。
2. the ultrasonic implement treatment method according to claim 1 for reducing titanium alloy plate residual stress of welded structure,
It is characterized in that：The width of the impact head is 2mm.
3. the ultrasonic implement treatment method according to claim 2 for reducing titanium alloy plate residual stress of welded structure,
It is characterized in that：The welded weld width of titanium-alloy thin-plate is 3mm-6mm.
4. the ultrasonic implement treatment method according to claim 3 for reducing titanium alloy plate residual stress of welded structure,
It is characterized in that：The number of shocks of the toe of weld impact is 3 times, impact velocity 200-300mm/min.
5. the ultrasonic implement treatment method according to claim 4 for reducing titanium alloy plate residual stress of welded structure,
It is characterized in that：The width of toe of weld impact is 4mm, 90 ° of angle of attack, single side impact.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611218344.5A CN108239734A (en) | 2016-12-26 | 2016-12-26 | A kind of ultrasonic implement treatment method for reducing titanium-alloy thin-plate residual stress of welded structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611218344.5A CN108239734A (en) | 2016-12-26 | 2016-12-26 | A kind of ultrasonic implement treatment method for reducing titanium-alloy thin-plate residual stress of welded structure |
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| CN108239734A true CN108239734A (en) | 2018-07-03 |
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| CN201611218344.5A Pending CN108239734A (en) | 2016-12-26 | 2016-12-26 | A kind of ultrasonic implement treatment method for reducing titanium-alloy thin-plate residual stress of welded structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235507A (en) * | 2018-11-29 | 2020-06-05 | 有研工程技术研究院有限公司 | Method for reducing residual stress of welded titanium alloy sheet welded cylinder structure |
| CN112795767A (en) * | 2020-12-25 | 2021-05-14 | 西安聚能装备技术有限公司 | Stress relieving device for titanium alloy welding and using method thereof |
| CN113543927A (en) * | 2019-03-08 | 2021-10-22 | 杰富意钢铁株式会社 | Hammer peening method for needle-shaped piece |
-
2016
- 2016-12-26 CN CN201611218344.5A patent/CN108239734A/en active Pending
Non-Patent Citations (3)
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| 杨彦涛等: "超声冲击处理钛合金焊接接头的性能研究", 《材料开发与应用》 * |
| 马杰等: "超声冲击对钛合金焊缝表面压应力的影响", 《宇航材料工艺》 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235507A (en) * | 2018-11-29 | 2020-06-05 | 有研工程技术研究院有限公司 | Method for reducing residual stress of welded titanium alloy sheet welded cylinder structure |
| CN113543927A (en) * | 2019-03-08 | 2021-10-22 | 杰富意钢铁株式会社 | Hammer peening method for needle-shaped piece |
| CN112795767A (en) * | 2020-12-25 | 2021-05-14 | 西安聚能装备技术有限公司 | Stress relieving device for titanium alloy welding and using method thereof |
| CN112795767B (en) * | 2020-12-25 | 2022-12-27 | 西安聚能装备技术有限公司 | Stress relieving device for titanium alloy welding and using method thereof |
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Application publication date: 20180703 |
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